Liang Kevin, Chow Chi-Wai, Liu Yang
Opt Express. 2016 Jul 25;24(15):17505-10. doi: 10.1364/OE.24.017505.
In order to increase the data rate of the camera-based visible light communication (VLC) system, using rolling shutter effect has been demonstrated successfully, in which the pixel rows of the complementary-metal-oxide-semiconductor (CMOS) image sensor are activated sequentially. Previous camera-based VLCs focused on using a stable LED light source, and its illumination area is positioned at the center of an image frame. In this work, we investigate the performance of a camera-based VLC with light source at different parts of an image frame. We propose and demonstrate using region-grow algorithm to track the light source. We also evaluate and discuss different scenarios when the light source is moved. Besides, a recorded > 5 kbit/s net data rate can be achieved by using only a single phosphor-based white-light LED source. Here, we demonstrate that 4.502 pixel/bit can be achieved.
为了提高基于摄像头的可见光通信（VLC）系统的数据速率，利用滚动快门效应已被成功证明，其中互补金属氧化物半导体（CMOS）图像传感器的像素行被顺序激活。先前基于摄像头的可见光通信专注于使用稳定的LED光源，并且其照明区域位于图像帧的中心。在这项工作中，我们研究了光源位于图像帧不同部分时基于摄像头的可见光通信的性能。我们提出并演示了使用区域生长算法来跟踪光源。我们还评估和讨论了光源移动时的不同场景。此外，仅使用单个基于荧光粉的白光LED光源就可以实现记录的>5 kbit/s的净数据速率。在此，我们证明可以实现4.502像素/比特。
